Black Sapphire 1 ct &X5X4 MM 742D

Product Details

  • Black Sapphire 1 ct &X5X4 MM 742D
  • 742D
  • sapphire
  • $40.00 inc. tax

  • Units in Stock: 1

Black Sapphire 1 ct &X5X4 MM 742D Summary

Black Sapphire 1 ct &X5X4 MM 742D

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100% real not man made but genuine from the earth gemstone.

100% Genuine and natural no treatment.

100% money back if not happy.  

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Corundum (aluminum oxide)


Padparadshah – Strong yellow, orange-pink to hot pink.

Ruby – Red to dark pink. Usually has a hint of violet.

Sapphire – Natural corundum is commonly thought of as dark blue, but it occurs in many other colors such as yellow, green, pink, colorless and purple.

Mohs hardness 9

Refractive index 1.766-1.774

Critical angle 34.5°

Specific gravity 3.99-4.0

Cleavage None

Fracture Uneven, conchoidal, splintery.

Dispersion .Moderately high (018)

Heat sensitivity None

Pleochroism Dichroic.  Darker colors usually show stronger dichroism.  Natural blue distinct (dark blue to greenish-blue); Natural green weak (more or less yellow); Natural orange strong (orange to yellow-brown or colorless); Natural purple distinct (purple to pinkish); Natural ruby strong (deep red to yellowish-red); Natural yellow weak (yellow to light-yellow).

Birefringence (double refraction) Weak (.018)

Crystal structure Hexagonal (trigonal), dipyramidal

Cutting Corundum cuts and polishes at varying rates on different facets.  Dont cut with a bonded lap at any finer grit than 600, otherwise an orange peel effect will make polishing a nightmare.  Pre-polish with 8,000 grit on ceramic, zinc or copper lap helps speed up final polishing immensely.

Polishing Ceramic with 100,000 or 200,000 diamond spray, or zinc lap with 50,000 or 100,000 diamond.  BATT can be used as a polish lap, but is a little soft for corundum.

Comments Orient for best color and yield.  Corundum cuts and polishes differently on different facets.


The Blue Sapphire is traditionally associated with purity and love.  It assists you to stay on the spiritual path, releasing blockages and providing strength.  Blue Sapphire facilitates self-expression, assisting in communication and expressing your truth and beliefs.  It opens and heals the thyroid and the throat chakra and has a calming and balancing effect on the nervous system.

Known as the "wisdom stone", each colour of Sapphire brings its own particular wisdom.  It releases mental tension, depression, unwanted thoughts and spiritual confusion.  Sapphire restores balance within the body, aligning the physical, mental and spiritual planes, bringing serenity and peace of mind.  It stimulates concentration, brings lightness, joy and peace of mind.  Sapphire is also known as a "stone of prosperity", attracting gifts of all kinds and fulfilling dreams and desires.

Sapphire treats blood disorders, combatting excessive bleeding and strengthening the walls of the veins.  It is used for cellular disorders, regulates the glands and calms overactive body systems.

In addition to the generic healing properties of Sapphire, specific colours have additional attributes:

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